Rinodina colobina has a dark grey thallus containing the pigment Sedifolia-grey. It resembles the widely distributed R. pityrea but is distinguished by the different spore type with strongly thickened cell walls (Pachysporaria to Mischoblastia type). It occurs on nutrient-rich, often dusty bark of well-lit deciduous trees, from lowlands to mountains. According to H. Mayrhofer (world expert on Rinodina, pers. comm.), the species has been declining during the last 100 years, mainly due to acidification of suitable substrates resulting from strong air pollution. In the Czech Republic, it had been collected until the 1930s, currently it is extinct.taxonomic classification:
All records: 2, confirmed 0. One click on a selected square displays particular record(s), including their source(s).